Knee Replacement Recovery: Range of Motion Timeline and Physical Therapy

ROM Goals by Phase

Time Post-Op	Flexion Target	Extension Target	Key Activities
1–2 weeks	60–90°	0° (full)	CPM machine, ankle pumps, quad sets, heel slides, edema control
2–4 weeks	90–110°	0°	Formal PT: stationary bike (rocking), standing exercises, gait training
4–8 weeks	110–120°	0°	Progressive strengthening, balance, stairs, community ambulation
8–12 weeks	120–130°	0°	Advanced strengthening, functional tasks, return to low-impact sports
12+ weeks	>120° (patient-dependent)	0°	Maintenance, sport-specific training, long-term joint health

Key Principles

• Early motion prevents arthrofibrosis.
• Consistent home exercise program (HEP) is essential.
• Pain management enables participation.
• Final ROM often correlates with pre-op ROM and surgical technique.